Which of the following IT controls would best prevent a currency trader from concealing his/her trading errors? Select one: 0 a. Symmetric encryption. b. Multifactor authentication. c. End user access to source code. d. Use of a private key. Which of the following IT controls would best prevent a developer from inappropriately accessing the system? Select one: a. Forced password changes. b. Lack of authentication. c. Symmetric encryption. d. Secondary code review